BV without symptoms: do you need treatment?

Author: Jessica Lloyd
Senior Vulvovaginal Specialist Naturopath | BHSc(N) | ISSVD, ISSWSH, BSSM, ATMS

Last reviewed: July 2, 2026

Yes, you can be told you have bacterial vaginosis (BV) when you feel completely fine, and for a lot of people that label may not mean anything is actually wrong. BV is usually diagnosed by scoring how much protective Lactobacillus bacteria show up on a sample.

The snag is that those scoring systems were built on fairly narrow groups of women, so a microbiome that is naturally low in Lactobacillus, and perfectly normal for that person, can get flagged as ‘diseased’.

A 2023 analysis went further, showing that computer tools built to diagnose BV misfire unevenly across ethnic groups.¹ So if your test says BV but you have no symptoms, it is a fair question whether you are unwell at all, or whether the yardstick simply does not fit you.

Can you be diagnosed with BV without symptoms?

Easily. A great many people who meet the laboratory definition of BV have no symptoms at all, with no unusual discharge, no odour and no irritation.⁶

That happens because the standard tests do not measure how you feel. They measure what the bacteria look like. The most common lab method, the Nugent score, counts the different bacterial shapes on a Gram-stained slide and gives you a number from 0 to 10, where a low Lactobacillus reading pushes the score towards ‘BV’.²

The other common method, Amsel’s criteria, looks at things like discharge, vaginal pH and a whiff test.³ Both were developed decades ago on limited reference populations, and both treat a Lactobacillus-rich sample as the healthy default.

Is BV over-diagnosed?

For symptom-free people, quite possibly. If the test’s idea of ‘normal’ is a microbiome dominated by Lactobacillus, then anyone whose normal state has less Lactobacillus can score as diseased even when nothing is wrong.

This matters because a ‘positive’ result rarely stays on paper. It tends to lead to antibiotics, worry, and repeat testing, none of which help someone who was never unwell in the first place.

None of this means BV is not real. It very much is, and when it causes symptoms it deserves proper treatment. The question is narrower, and worth asking: does a number on a slide, on its own, mean disease for you?

Why do BV diagnoses differ by ethnicity?

Because a Lactobacillus-dominant microbiome is not the universal normal it was once assumed to be. In a study of nearly 400 healthy, symptom-free women, only around 60 per cent of the Black and Hispanic participants had a Lactobacillus-dominated microbiome.⁴ The rest had a more diverse mix of bacteria and a higher vaginal pH, and it appeared normal and healthy for them.

A larger study found the same pattern: even among women with no diagnosis and no symptoms, those of African ancestry were more likely to have a diverse, less Lactobacillus-heavy community than women of European ancestry.⁵

Now line that up against a scoring system that reads ‘less Lactobacillus‘ as ‘more likely BV’. You can see how a normal microbiome for one group gets scored as disease. When researchers tested machine-learning tools that diagnose BV from microbiome sequencing, the tools were most accurate for white women and least accurate for Asian women, and were more likely to wrongly flag BV in Hispanic and Black women.¹

This is a critique of the measuring stick, not of any group of people. You can read more about how this plays out in whether Black women are really more prone to BV.

What this means for your vagina

Your vaginal microbiome is personal. A community that is lower in Lactobacillus can still be stable, comfortable and protective for you, and it does not automatically need correcting.

In our clinic, we read a result alongside your symptoms and your history rather than treating a number on its own. Someone with a ‘positive’ score and no symptoms is a very different picture from someone who is miserable with discharge and odour, and the two do not get the same plan.

What we are most interested in is what tipped the balance if something has shifted, because understanding the why is what keeps real, symptomatic BV from coming back. A one-off score, on its own, rarely tells us that.

Why over-diagnosis matters

Treating a symptom-free ‘positive’ usually means a course of antibiotics. Antibiotics knock back disruptive bacteria, but they also disturb the protective ones, which can leave the microbiome less stable than before and set up a frustrating cycle of clearing and relapse.

There is a bigger cost too. If the reference populations behind our tests skew towards one group, the whole evidence base tilts with them, and everyone downstream inherits the same blind spot. Better, population-aware definitions of ‘normal’ would serve far more people well.

What ‘normal’ should mean

Normal is best understood as normal for the person in front of you: symptoms plus context, rather than a score in isolation. A comfortable, stable microbiome with a higher pH and less Lactobacillus can be perfectly healthy.

The field is slowly moving this way, towards diagnostics that account for the real diversity of healthy vaginas rather than a single reference template. Until that is standard, a symptoms-first reading is the safest way to interpret any BV result.

Practical takeaway

If you have a ‘BV’ result but no symptoms, it is worth asking a few questions before starting treatment:

Do I actually have symptoms, or was this picked up incidentally?
What method was used, and what is my vaginal pH?
Is my microbiome stable and comfortable for me, even if it is lower in Lactobacillus?
Is there a specific reason to treat right now, such as symptoms or an upcoming procedure?

Current guidelines reserve treatment mainly for people with symptoms. Routine treatment of symptom-free BV, including in pregnancy, is not recommended simply to prevent preterm birth.⁸ There are specific situations where a clinician may still choose to treat, such as before some gynaecological procedures, but that is a considered decision rather than an automatic one.

Frequently asked questions

Do I need treatment for BV if I have no symptoms?

Usually not. Guidelines focus treatment on people with symptoms, and routine treatment of asymptomatic BV, including during pregnancy, is not generally recommended.^7,8 If you have no symptoms, it is reasonable to ask your clinician whether treatment is needed at all.

Can a BV test be wrong for me?

A test can be technically correct and still misleading. If your normal, healthy microbiome carries less Lactobacillus, a scoring system built around Lactobacillus dominance can read that as BV when nothing is actually wrong.^1,4

Is a non-Lactobacillus microbiome unhealthy?

Not necessarily. Research shows that many healthy, symptom-free women, particularly Black and Hispanic women, have diverse communities with less Lactobacillus and a higher pH, and these appear normal for them.^4,5 Diversity alone is not the same as disease.

Why might my result differ from a friend’s with the same bacteria?

Because the same reading can mean different things in different bodies. Symptoms, pH, history and your baseline microbiome all shape whether a result reflects a problem, which is why two people with similar samples can need very different advice.

What to do next

If you want to understand your own microbiome properly rather than rely on a single score, a comprehensive vaginal microbiome test gives you a fuller picture of what is actually there.

If you have symptoms, recurring BV, or a result you are not sure how to read, you can book an appointment and we will interpret it in the context of you rather than against a template. For the full background on the condition itself, see our guide to bacterial vaginosis.

This is general information, not a substitute for personalised medical advice.